behavior chart---everyone starts in the middle. Lots of opportunities for teacher to give positive reinforcement. (Students do not automatically start on the top, like in the traditional green, yellow, red model, students earn their way higher through making good choices.)
I've made this as cupcakes many times- always turns out so cool, and always a hit. When I do cupcakes I make several different colors of icing, ice some red, some blue, some yellow...makes a great display.